McCall lost most of his regular starting line-up after securing a second-placed finish but began the weekend in third place in the Scottish Premiership with 12 points from six games.
Motherwell are looking for their fourth consecutive victory when they face Dundee United on Sunday at Tannadice, a venue where they have collected 10 points from their last four visits.
McCall said: "I think sometimes we are victims of our own success. I always said the Aberdeen game would be a tough one after the European exploits, and going up to Inverness, the way they have started, was always going to be tough.
"I think we have merited every one of the four wins. Although they have all been by a single goal, I think if we had taken our chances earlier we could have killed teams off.
"I admit myself we are probably not playing with the same attacking fluency and flair as we did last season but it was only the back end of last season when we started really scoring goals. Up to Christmas we were doing well but winning tight games like we are now.
"I've been pleased. With the overhaul of players we have had, to be sat with four wins from six games, the same points total as we had at this stage last season, I'm more than pleased.
"We have three clean sheets out of six and last season we only had six in the entire 38 games. So that's an improvement.
"We are not defending or trying to defend more than we did last season, we are still trying to get at teams. We just need to take chances."
United manager Jackie McNamara had a similar rebuilding job to do and his side have grown together quickly in recent weeks, especially in an attacking sense.
Attacking midfielders Ryan Gauld and Stuart Armstrong were both on target in last weekend's 4-2 win over Ross County along with winger Gary Mackay-Steven and forward Nadir Ciftci, who has settled into Scottish football so well that he kept David Goodwillie out of the team at Dingwall.
McCall said: "They have three young lads who are impressive at the moment, wee (Ryan) Gauld who is 17, is a great talent. Armstrong, we know has potential, but at the minute he is on top of his game and Mackay-Steven is the same.
"They are all a threat and for them to have Goodwillie on the bench last week shows how strong they are middle to front.
"It's nice to see young Scottish boys getting the chance, and not only getting the chance but earning the chance and playing well."